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Anticorrosion and dispersive adsorption studies of natural andrographolide on carbon steel in acid-chloride environments

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机构： [1]School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong 643000, Sichuan, PR China [2]Key Laboratory of Material Corrosion and Protection of Sichuan Province, Zigong 643000, Sichuan, PR China [3]Computational and Bio-simulation Research Group, University of Calabar, Calabar, Nigeria [4]Corrosion and Electrochemistry Research Group, Department of Pure and Applied Chemistry, University of Calabar, P.M.B. 1115 Calabar, Nigeria [5]Mechanical and Mechatronics Engineering, Dhofar University, Salalah, Oman [6]College of Chemical Engineering, Institute of Pharmaceutical Engineering Technology and Application, Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, Sichuan University of Science & Engineering, Zigong 643000, Sichuan, PR China [7]Zigong First People’s Hospital, Zigong, Sichuan 643000, PR China [8]State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, Kunming, Yunnan 650201, PR China

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Andrographolide, a bioactive naturally occurring labdane diterpenoid with outstanding antioxidant effects in medicine, has been isolated and purified from Andrographis paniculata, and applied in acid-chloride environments for the corrosion protection of carbon steel. Upon isolation, the phytochemical was identified by NMR and FTIR, while its corrosion inhibition evaluation was achieved by combined electrochemical and gravimetric experiments. The adsorption of andrographolide on carbon steel was examined by SEM, FTIR, and 3D surface measurement, and computational studies were used to describe the adsorption characteristics and properties. The experimental measurements revealed that andrographolide is an effective mixed-type corrosion inhibitor whose efficiency was dependent on both its concentration and the temperature of the environment, with maximum inhibition efficiency of 92.4% recorded for 2.0 g/L andrographolide after 48 h at 318 K. The adsorption of andrographolide and its anticorrosion capacity on carbon steel surface was confirmed by the employed surface analytical techniques, while molecular electrostatic potential, conceptual density functional theory, and molecular dynamics simulation predicted the quantum chemical details and binding properties of the phytochemical on Fe (110) surface at different temperatures.Copyright © 2021 Elsevier B.V. All rights reserved.

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出版当年[2021]版：

大类 | 2 区化学

小类 | 2 区生化与分子生物学 2 区生物学 2 区生物物理 3 区电化学

最新[2023]版：

大类 | 2 区化学

小类 | 2 区生物学 2 区生物物理 2 区电化学 3 区生化与分子生物学

第一作者：

第一作者机构： [1]School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong 643000, Sichuan, PR China [2]Key Laboratory of Material Corrosion and Protection of Sichuan Province, Zigong 643000, Sichuan, PR China [*1]School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong 643000, Sichuan, PR China.

通讯作者：

通讯机构： [1]School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong 643000, Sichuan, PR China [2]Key Laboratory of Material Corrosion and Protection of Sichuan Province, Zigong 643000, Sichuan, PR China [6]College of Chemical Engineering, Institute of Pharmaceutical Engineering Technology and Application, Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, Sichuan University of Science & Engineering, Zigong 643000, Sichuan, PR China [8]State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, Kunming, Yunnan 650201, PR China [*1]School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong 643000, Sichuan, PR China.

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